\section{Special cases, corner cases}

\subsection{EXE\_STAGE }

\begin{itemize}
  \item 
  \item Instructions not supported by the core (Floating points, )
\end{itemize}

\subsection{ALU}

\begin{itemize}
  \item ADD, SUB and SLL overflows
  \item Instructions not supported by the ALU
\end{itemize}

\subsection{Branch Unit}

\begin{itemize}
  \item When \emph{pc\_i} plus \emph{imm\_i} have the two lower bits set to 1
  \item Instructions not supported by the Branch Unit
  \item When \emph{data\_rs1\_i} plus \emph{imm\_i} have the two lower bits set to 1
\end{itemize}